公开(公告)号：US20170111313A1

公开(公告)日：2017-04-20

申请号：US14882522

申请日：2015-10-14

Applicant: Cisco Technology, Inc.

Inventor： Eliot Lear ,  James Bieda

IPC: H04L29/12

CPC classification number: H04L61/1511 ,  H04L61/2015 ,  H04L61/6009 ,  H04L63/0236

Abstract: In one embodiment, a caching resolver receives a name server query from an end device for an Internet Protocol (IP) address for a hostname, and determines whether the hostname requested is in an access control list (ACL). In response to the hostname being in the ACL, the caching resolver examines a received response to the name server query for the hostname, wherein the received response contains a particular IP address for the hostname, and adds the particular IP address for the hostname to the ACL. In one embodiment, the ACL is local to the caching resolver, while in another embodiment, adding the particular IP address for the hostname to the ACL comprises sending a message to a remote ACL-maintaining device that maintains the ACL.

公开(公告)号：US10079799B2

公开(公告)日：2018-09-18

申请号：US14882522

申请日：2015-10-14

Applicant: Cisco Technology, Inc.

Inventor： Eliot Lear ,  James Bieda

IPC: H04L29/12 ,  H04L29/06

CPC classification number: H04L61/1511 ,  H04L61/2015 ,  H04L61/6009 ,  H04L63/0236

Abstract: In one embodiment, a caching resolver receives a name server query from an end device for an Internet Protocol (IP) address for a hostname, and determines whether the hostname requested is in an access control list (ACL). In response to the hostname being in the ACL, the caching resolver examines a received response to the name server query for the hostname, wherein the received response contains a particular IP address for the hostname, and adds the particular IP address for the hostname to the ACL. In one embodiment, the ACL is local to the caching resolver, while in another embodiment, adding the particular IP address for the hostname to the ACL comprises sending a message to a remote ACL-maintaining device that maintains the ACL.